CN118540887A - A low-loss flameproof intrinsically safe composite antenna coupler - Google Patents

A low-loss flameproof intrinsically safe composite antenna coupler Download PDF

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Publication number
CN118540887A
CN118540887A CN202410755708.1A CN202410755708A CN118540887A CN 118540887 A CN118540887 A CN 118540887A CN 202410755708 A CN202410755708 A CN 202410755708A CN 118540887 A CN118540887 A CN 118540887A
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CN
China
Prior art keywords
pcb board
pins
loss
low
intrinsically safe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410755708.1A
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Chinese (zh)
Inventor
陈文杰
徐微分
蒋正楠
黄建刚
马云
李沙沙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Botaike Thermal Control Equipment Pinghu Co ltd
Original Assignee
Botaike Thermal Control Equipment Pinghu Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Botaike Thermal Control Equipment Pinghu Co ltd filed Critical Botaike Thermal Control Equipment Pinghu Co ltd
Priority to CN202410755708.1A priority Critical patent/CN118540887A/en
Publication of CN118540887A publication Critical patent/CN118540887A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0215—Grounding of printed circuits by connection to external grounding means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/002—Casings with localised screening
    • H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0064—Earth or grounding circuit

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

本发明公开了一种低损耗的隔爆本安复合型天线耦合器，包括外壳，所述外壳内设有PCB板和两个串联电容，PCB板连接的金属接头为对称的圆形接头，外壳的接头处设有四针脚，PCB板插入四针脚中间进行安装，PCB板背面通过铜覆板全覆盖，并与两针脚焊接连接，所述PCB板正面中间做信号电路，串联电容，信号电路铜覆板采用满足高频传输的铜覆板，本发明适用于危险区域，能够在危险区域直接拆除天线。并且能配用不同型式的连接接头，安装简单方便，是一种在危险区域无线网络部署的高度灵活且经济高效的解决方案。

The present invention discloses a low-loss flameproof intrinsically safe composite antenna coupler, comprising a shell, a PCB board and two series capacitors are arranged in the shell, the metal joint connected to the PCB board is a symmetrical circular joint, four pins are arranged at the joint of the shell, the PCB board is inserted in the middle of the four pins for installation, the back of the PCB board is fully covered by a copper clad plate and is welded and connected with two pins, a signal circuit is made in the middle of the front of the PCB board, a series capacitor is connected, and the signal circuit copper clad plate adopts a copper clad plate that meets high-frequency transmission. The present invention is suitable for hazardous areas and can directly remove the antenna in hazardous areas. It can also be equipped with different types of connection connectors, and is simple and convenient to install. It is a highly flexible and economical and efficient solution for wireless network deployment in hazardous areas.

Description

Low-loss flameproof intrinsically safe composite antenna coupler
Technical Field
The invention relates to the technical field of frequency signal energy-limiting communication transmission isolation, in particular to a low-loss flameproof intrinsically safe composite antenna coupler.
Background
The explosion-proof antenna coupler is an intrinsic safety circuit, and the intrinsic safety circuit is used for meeting the energy limiting problem of transmission and potential surge influence and is used for shielding, isolating and grounding. Aiming at the performance requirement that the coupler user needs low attenuation, the attenuation of the high-frequency signal through the capacitor is solved to the greatest extent according to the inherent characteristic matching of the capacitor. The circuit board and the epoxy packaging material which meet the requirements of high-frequency signal transmission and shielding are selected, and the signal attenuation between the signal transmission circuit and the shielding grounding isolation circuit and between the coupler shells is solved. Meanwhile, the high voltage-resistant breakdown-resistant problem between the signal circuit and the shell needs to be solved.
The existing explosion-proof antenna coupler has the defects of limited antenna selection, inflexible installation and use, severe use conditions in dangerous areas and large attenuation of signal transmission, and can not meet the current increasing high-capacity wireless network transmission requirements. Therefore, the invention provides a low-loss flameproof intrinsically safe composite antenna coupler to solve the problems in the background technology.
Disclosure of Invention
The invention aims to provide a low-loss flameproof intrinsically safe composite antenna coupler so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides a low-loss flameproof intrinsically safe composite antenna coupler, includes the shell, be equipped with PCB board and two series connection electric capacity in the shell, the metal joint that the PCB board is connected is symmetrical circular joint, and the joint department of shell is equipped with four pins, and the PCB board inserts four pins centre and installs, and the PCB board back is through copper sheathing full coverage to with two pin welded connection, signal circuit is done to PCB board front centre, two series connection electric capacity, signal circuit copper sheathing adopts the copper sheathing that satisfies high-frequency transmission, and isolated ground circuit is done to PCB board front both sides, puts into an insulating PC board in the PCB front, and the height of PC board is less than the height of two pins of circular joint department, puts into a "pi" shape white copper plate on two pins to do circumference shielding isolation ground to the PCB board, and the PCB board material also must adopt high frequency insulation board, for example high frequency PTFE insulation board, must satisfy signal circuit and shielding isolation ground circuit simultaneously.
Preferably, the individual capacitances of the series capacitors must not be greater than 340pF and the test voltage satisfies 1500V.
Preferably, the copper sheathing has a thickness greater than 60um and a width greater than 3mm.
Preferably, the creepage distance between the grounding circuit and the signal circuit is greater than 3.3mm.
Preferably, the potting adhesive in the shell is used as an important packaging medium for connecting the main signal circuit, shielding and isolating the grounding circuit and the metal shell, and high-purity high-insulation high-frequency epoxy adhesive is adopted to meet the requirements of attenuation, pressure resistance and surge prevention.
Compared with the prior art, the invention has the beneficial effects that:
The invention is suitable for dangerous areas, has low signal attenuation and is used for an explosion-proof intrinsically safe composite communication transmission device for transmitting high-frequency signals from 2.4 to 6GHz, belongs to a high-frequency signal energy-limiting communication transmission isolation device, and mainly relates to a low-loss energy-limiting intrinsically safe circuit design, an insulating PCB (printed circuit board) meeting the requirements of high-frequency signal transmission and shielding, and an insulating and isolated epoxy resin package.
By using the device, the antenna which is not subjected to explosion proof authentication can be installed in a dangerous area. It also enables direct removal of the antenna in hazardous areas due to the limited energy circuitry. And can be matched with different types of connection joints, is simple and convenient to install, and is a highly flexible, economical and efficient solution for wireless network deployment in dangerous areas.
Drawings
Fig. 1 is a schematic structural diagram of a low-loss flameproof intrinsically safe composite antenna coupler.
Fig. 2 is a schematic structural diagram of a PCB board in a low-loss flameproof intrinsically safe composite antenna coupler.
Fig. 3 is a schematic structural diagram of a copper-clad plate in a low-loss flameproof intrinsically safe composite antenna coupler.
Fig. 4 is a schematic cross-sectional structure of a low-loss flameproof intrinsically-safe composite antenna coupler.
In the figure: 1.a circular joint; 2.a stitch; 3. a PCB board; 4. and a copper-clad plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, in the embodiment of the invention, a low-loss flameproof intrinsically safe composite antenna coupler comprises a housing, wherein a PCB 3 and two series capacitors are arranged in the housing, the single capacitance of the series capacitors is not more than 340pF and the test voltage satisfies 1500v, the metal joint connected with the PCB 3 is a symmetrical circular joint 1, the insertion loss of the coupler can be reduced by 2-4% compared with the existing square joint, four pins 2 are arranged at the joint of the housing, the PCB 3 is inserted into the middle of the four pins 2 for installation, the back surface of the PCB 3 is fully covered by a copper cladding plate and is welded and connected with the two pins 2, a signal circuit is arranged in the middle of the front surface of the PCB 3, the series capacitors are connected with each other by 2, the copper cladding plate of the signal circuit adopts a copper cladding plate satisfying high-frequency transmission, the thickness is more than 60um, the width is larger than 3mm, the creepage distance between the grounding circuit and the signal circuit is larger than 3.3mm, an insulating PC board is arranged on the front surface of the PCB, the height of the PC board is lower than the height of two pins 2 at the circular joint 1, an n-shaped white copper board 4 is arranged on the two pins 2 to perform circumferential shielding, isolation and grounding on the PCB 3, the PCB 3 is made of high-frequency insulating plates, meanwhile, the signal circuit and the shielding, isolation and grounding circuit are required to be met, the pressure resistance between the signal circuit and a shell is required to be 1500v, the minimum creepage distance is required to be 3.3mm, potting adhesive in the shell is used as a packaging important medium for connecting the main signal circuit, and the shielding, isolation and grounding circuit and the metal shell are required to be packaged by adopting high-frequency epoxy adhesive with high purity and high insulating performance so as to meet the requirements of attenuation, pressure resistance and surge resistance.
The working principle of the invention is as follows:
The explosion-proof coupler firstly needs to meet the design requirement of an intrinsic safety circuit and prevent surge influence, so that two series capacitors are needed, the single capacitance is not more than 340pF, and the test voltage meets 1500V. In addition, the shape of the metal connector connected with the PCB 3 can also influence signal attenuation, and compared with a square connector, the symmetrical round connector 1 can reduce the insertion loss of the coupler by 2-4%. For preventing surge and shielding grounding isolation, a comprehensive shielding isolation grounding circuit is required to be made in the circumferential direction of the PCB 3, and the signal attenuation can be greatly reduced by making the comprehensive shielding isolation grounding circuit in the circumferential direction of the PCB 3. The comparison test shows that the complete shielding isolation grounding circuit in the circumferential direction of the PCB 3 can reduce the insertion loss of the coupler by 11-15%. Therefore, the four-pin 2 design is required for the coupler connector, the PCB 3 is inserted into the middle of the four-pin 2 for installation, the back of the PCB 3 is covered by a copper cladding plate, and the PCB is welded and connected with the two pins 2. The signal circuit is made to PCB board 3 openly centre, establishes ties two electric capacity, and signal circuit copper sheathing board adopts the copper sheathing board that satisfies high-frequency transmission, and thickness is greater than 60um, and the width is greater than 3mm, and the isolation earthing circuit is made to PCB board 3 openly both sides, and earthing circuit must be greater than 3.3mm with signal circuit's creepage distance.
An insulating PC board is arranged on the front surface of the PCB, the height of the PC board is lower than that of the two pins 2 of the connector, and a reverse U-shaped white copper board 4 is arranged on the pins 2 of the circular connector 1 so as to circumferentially shield, isolate and ground the PCB. The PCB 3 is also made of high-frequency insulating board. Meanwhile, the voltage withstand of the signal circuit and the shell is 1500v, and the minimum creepage distance is required to be 3.3mm. The potting adhesive is used as an important packaging medium for connecting the main signal circuit, shielding and isolating the grounding circuit and the metal shell, and high-purity high-insulation high-frequency epoxy adhesive is still required to be adopted to meet the requirements of attenuation, pressure resistance and surge prevention.
According to the design requirements, the connection joint of the tested circuit board can meet the extremely good value that the 6GHz attenuation is not more than 0.8dB at the ring temperature of 20 ℃ and can pass the anti-surge requirement.
The invention meets the requirements of intrinsic safety explosion-proof design and surge prevention. The typical insertion loss values at 20 ℃ at different frequency points, 2.4GHz,4.6GHz and 6GHz, are respectively-0.4 dB, -0.5dB and-0.8 dB. By using the device, the antenna which is not subjected to explosion proof authentication can be installed in a dangerous area. It also enables direct removal of the antenna in hazardous areas due to the limited energy circuitry. And can be matched with different types of connection joints, is simple and convenient to install, and is a highly flexible, economical and efficient solution for wireless network deployment in dangerous areas.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (5)

1.一种低损耗的隔爆本安复合型天线耦合器，包括外壳，其特征在于，所述外壳内设有PCB板(3)和两个串联电容，PCB板(3)连接的金属接头为对称的圆形接头(1)，外壳的接头处设有四针脚(2)，PCB板(3)插入四针脚(2)中间进行安装，PCB板(3)背面通过铜覆板全覆盖，并与两针脚(2)焊接连接，所述PCB板(3)正面中间做信号电路，串联两电容，信号电路铜覆板采用满足高频传输的铜覆板，PCB板(3)正面两侧做隔离接地电路，在PCB正面置入一绝缘PC板，PC板的高度低于圆形接头(1)处两针脚(2)的高度，在两针脚(2)上面放入一“∏“形白铜板(4)，以对PCB板(3)做周向的屏蔽隔离接地，PCB板(3)材质也须采用高频绝缘板材。1. A low-loss flameproof intrinsically safe composite antenna coupler, comprising a shell, characterized in that a PCB board (3) and two series capacitors are arranged in the shell, the metal joint connected to the PCB board (3) is a symmetrical circular joint (1), four pins (2) are arranged at the joint of the shell, the PCB board (3) is inserted in the middle of the four pins (2) for installation, the back of the PCB board (3) is fully covered by a copper clad plate and is welded and connected to the two pins (2), a signal circuit is made in the middle of the front of the PCB board (3), two capacitors are connected in series, the signal circuit copper clad plate adopts a copper clad plate that meets high-frequency transmission, isolation grounding circuits are made on both sides of the front of the PCB board (3), an insulating PC board is placed on the front of the PCB, the height of the PC board is lower than the height of the two pins (2) at the circular joint (1), a "∏"-shaped white copper plate (4) is placed on the two pins (2) to perform circumferential shielding, isolation and grounding on the PCB board (3), and the material of the PCB board (3) must also adopt a high-frequency insulating plate. 2.根据权利要求1所述的一种低损耗的隔爆本安复合型天线耦合器，其特征在于，所述串联电容的单个电容量不得大于340pF且测试电压满足1500V。2. A low-loss flameproof intrinsically safe composite antenna coupler according to claim 1, characterized in that the single capacitance of the series capacitor shall not be greater than 340pF and the test voltage satisfies 1500V. 3.根据权利要求1所述的一种低损耗的隔爆本安复合型天线耦合器，其特征在于，所述铜覆板厚度大于60um，宽度大于3mm。3. A low-loss flameproof intrinsically safe composite antenna coupler according to claim 1, characterized in that the copper clad plate has a thickness greater than 60 um and a width greater than 3 mm. 4.根据权利要求1所述的一种低损耗的隔爆本安复合型天线耦合器，其特征在于，所述接地电路与信号电路的爬电距离大于3.3mm。4. A low-loss flameproof intrinsically safe composite antenna coupler according to claim 1, characterized in that the creepage distance between the ground circuit and the signal circuit is greater than 3.3 mm. 5.根据权利要求1所述的一种低损耗的隔爆本安复合型天线耦合器，其特征在于，所述外壳内的灌封胶做为连接主信号电路，灌封胶采用高频环氧胶。5. A low-loss flameproof intrinsically safe composite antenna coupler according to claim 1, characterized in that the potting glue in the shell is used to connect the main signal circuit, and the potting glue adopts high-frequency epoxy glue.
CN202410755708.1A 2024-06-12 2024-06-12 A low-loss flameproof intrinsically safe composite antenna coupler Pending CN118540887A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410755708.1A CN118540887A (en) 2024-06-12 2024-06-12 A low-loss flameproof intrinsically safe composite antenna coupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410755708.1A CN118540887A (en) 2024-06-12 2024-06-12 A low-loss flameproof intrinsically safe composite antenna coupler

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CN118540887A true CN118540887A (en) 2024-08-23

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7057577B1 (en) * 2004-05-13 2006-06-06 Ventek Llc Antenna connector for hazardous area
CN102802393A (en) * 2012-07-30 2012-11-28 宁波兴瑞电子有限公司 Antenna isolator
CN218569260U (en) * 2022-10-27 2023-03-03 浙江衡玖医疗器械有限责任公司 PCB fixing structure of connector
CN117355059A (en) * 2022-07-05 2024-01-05 索莱西股份有限公司 Explosion-proof accessories for antennas, central components of explosion-proof accessories for antennas, explosion-proof boxes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7057577B1 (en) * 2004-05-13 2006-06-06 Ventek Llc Antenna connector for hazardous area
CN102802393A (en) * 2012-07-30 2012-11-28 宁波兴瑞电子有限公司 Antenna isolator
CN117355059A (en) * 2022-07-05 2024-01-05 索莱西股份有限公司 Explosion-proof accessories for antennas, central components of explosion-proof accessories for antennas, explosion-proof boxes
CN218569260U (en) * 2022-10-27 2023-03-03 浙江衡玖医疗器械有限责任公司 PCB fixing structure of connector

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Application publication date: 20240823

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